Improving the rate performance of LiFePO4 by Fe-site doping

Magnetic anisotropy in doped and undoped LiFePO4 single crystals

“…Significant enhancement of conductivity has been observed in polycrystalline LFPO doped with Mg, Ni, Co, Nb, Zr, and Ti. 3,4 However, the underlying mechanisms for the enhancement are still very controversial and not fully understood, as some conductive impurities were found in the doped LFPO polycrystalline powders and bulks. 5 On the other hand, the LFPO compound also exhibits interesting electric structures and magnetic properties, such as spin polarization 6 and one-dimensional antiferromagnetism along the ͑010͒ direction.…”

The Origin of the Residual Carbon in LiFePO4Synthesized by Wet Milling

“…[1][2][3] However, the commercial application of LiFePO4 as a cathode for lithium secondary batteries has been limited because of its low electrical conductivity and poor rate capability. Recent research efforts have focused on improving the electrical conductivity of LiFePO 4 by coating carbonaceous conductors [4][5][6] and doping with metallic elements such as Cr, Mg, Ni, or Co. [7][8][9] Ravet et al 4 coated LiFePO4 using sucrose, cellulose acetate, and a modified polycyclic aromatic and achieved the initial discharge capacity up to 140 mAhg -1 . Prosini et al 5 investigated LiFePO4 coated with 10 wt % carbon black and obtained initial capacity up to 120 mAhg -1 .…”

“…Prosini et al 5 investigated LiFePO4 coated with 10 wt % carbon black and obtained initial capacity up to 120 mAhg -1 . Chung et al 7 reported that electrical conductivity of LiFePO 4 was enhanced by metal doping and the doped cathode delivered 140 mAhg -1 at 0.1 C. Wang et al 9 also reported the enhancement of rate performance of LiFePO 4 by metal doping without increasing the initial capacity. They suggested that the initial capacity is mainly improved by increasing the electrical conductivity of the LiFePO 4 , while the rate performance could be enhanced by metal doping.…”

Model Prediction and Experiments for the Electrode Design Optimization of LiFePO4/Graphite Electrodes in High Capacity Lithium-ion Batteries

“…In an attempt to improve the power performance of lithiumion batteries using LiFePO 4 , researchers have investigated the use of carbon coating [1][2][3] or metallic element doping [4][5][6] to increase the electrical conductivity, or by using nano-sized LiFePO 4 particles 7,8 to decrease the ionic diffusion distance. In addition, optimization studies have also been conducted to determine the optimal ranges for the LiFePO 4 battery design parameters, including the particle size, the electrode thickness, the porosity (density), and the conductor ratio (conductor weight fraction).…”